349 10th Street (Bryan Green) 1Mr. Green,
I will be able to answer a few of your questions.
Impervious areas are those areas that prevent the entry of water into
the soil. Common impervious surfaces include, but are not limited to
rooftops, sidewalks, patio areas, driveways, sheds, AC pads and any
other surfaces made of concrete, asphalt, or brick. Wood decking
elevated 2” or more above the ground is not considered impervious
provided that the ground beneath the decking is not impervious. The area
of water within a swimming pool is not considered impervious, but all
decking would be considered impervious depending on the material used.
The City of Atlantic Beach allows for a lot to be 50% maximum
impervious. This is within the property boundaries. Right of ways areas
will be calculated separately but have the same conditions. Sidewalks
are usually within the Right of Way.
Surfaces using pervious concrete or other similar open grid paving
systems will be calculated as a 50% reduction, provided that there is no
barrier to natural percolation. Manufacture cut sheets are required to
receive the 50% reduction. When installing open grid pavers, they must
be installed on a sand base without a liner in order to receive the 50%
credit. We use the ICPI-68 as a subgrade rule.
Onsite storage (water retention) is required if a property is adding
400 S/F or more of impervious area. The added impervious area must drain
to the water retention area and any overflow must run to the street. The
size of the water retention is based on a 9.3” rainfall within a 24 hour
period. The water run off to the street can be obtained by swales or by
drain pipe. In the case of a demo and rebuild, credit is given for any
demo area with a certified plan.
I hope that this answers some of your questions. Please feel free to
call me if you have any question about the items that I have tried to
explain. I will be more than happy to meet with you on any items
including helping out with plans to do water retention.
Scott Williams
Deputy Public Works Director
City of Atlantic Beach
Office: (904) 247-5834
swilliams@coab.us
From: DeCandis, Drew
Sent: Monday, November 21, 2016 5:02 PM
To: Williams, Scott <swilliams@coab.us>
Subject: FW: 349 Tenth St. Atlantic Beach
Scott,
Could you respond to this email from an architect about some
residential building lot issues and how we calculate them? He is
talking about a lot in the RS-2 zoning district. Can you copy me so I
can educate myself?
Thanks.
Drew DeCandis, AICP
Planning and Development Director
City of Atlantic Beach
800 Seminole Road
Atlantic Beach, Fl 32233
Email: Adecandis@coab.us <mailto:Adecandis@coab.us>
Phone: 904-247-5817
Web: www.coab.us <http://www.coab.us>
Fax: 904-247-5845
From: bgreen@oneelevenconstruction.com
<mailto:bgreen@oneelevenconstruction.com>
[mailto:bgreen@oneelevenconstruction.com]
Sent: Monday, November 21, 2016 3:43 PM
To: DeCandis, Drew <adecandis@coab.us <mailto:adecandis@coab.us> >
Subject: 349 Tenth St. Atlantic Beach
Andrew,
Please provide the following info for 349 Tenth St.
1. Zoning Classification (RS1 or RS2) RS-2
2. How impervious is calculated (would it include any sidewalks)
Verify only within the property boundaries?
3. DO pavers / Decks have different ratios for impervious
calculations (Reductions)?
4. Building Height and from what is the measurement origin?
5. FFE What is the minimum elevation required jurisdictionally
either by Atlantic Beach and or FEMA? What Datum requirement?
6. Existing tree and or new tree or landscaping requirements or
credits generated by on site conditions?
7. Swale or retentive requirements?
Thank You
Bryan Green, Architect (AR95312)
One Eleven Construction, LLC (CBC1250049)
904.662.1781
www.oneelevenconstruction.com <http://www.oneelevenconstruction.com>
3810 Tropical Terrace
Jacksonville BEach, FL 32250